Lunch box



FIG. 1 is a perspective view of the lunch box showing our new design;

FIG. 2 is a front plan thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a back plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a side plan view thereof; and,

FIG. 7 is a side plan view thereof. 

The ornamental design of a lunch box, as shown and described. 